About this item EFFECTIVE PAIN RELIEF: Our memory foam pillows are available in two heights. 2.5'' thick is designed mainly for stomach sleepers. 3.25'' cool pillow is thicker and provides more support for side and back sleepers. The ideal of firmness fully supports your head and neck to help fall asleep fast to improve your sleeping quality. Kingfun stomach sleeper pillows let you wake up every day without pain. HIGH QUALITY MEMORY FOAM: Slim pillow is filled with 100% high-density memory foam, fit the curve of your head perfectly so that your head doesn't sink too much into the soft pillows. Memory foam pillow helps to reduce the frequency of tossing and turning, relieving pressure. The flat pillows for sleeping has better rebound ability and keep their shape after long-term use. DOUBLE BREATHABLE PILLOWCASES: This ultra thin pillow has a double pillowcase to protect it. The inner pillowcase can prevent dust and dirt, and extend the lifetime of the cool gel pillows. The outer cover is made of bamboo fiber, which is skin-friendly, cooler, and more breathable, you can use it rest assured. Kingfun gel pillows for sleeping will always be with you. COOLER & VENTILATED: Unique air holes ventilated design of cooling pillows for sleeping optimizes air circulation. Added cooling gel particles also help for controlling temperature and avoiding heat buildup. It enables the heat produced from the back of the head and the pillow to dissipate. Ready for better sleep? You don't have to worry about waking up due to sweat. PACKAGE CONTENTS AND SERVICES: With the purchase of the KINGFUN low profile pillow, you will receive a soft pillow and a travel bag. For storage, you can roll it up and put it in the travel bag. Our pillows for sleeping are certified by CertiPUR-US and Oeko-Tex’s Standard 100. We are offering a 100-night trial and 3 years warranty, if there are any problems during your use, feel free to contact us at any time.